never heard of that rule of thumb... my last grow was three month solid root ball in my 7 gallon pot pull it out whole
every time.. think your rule of thumb is off by a mile or 2... i bet i could fill up a 10 gallon pot in 3 moths full root ball.. .. these root ball i be bashing on the front lawn in spring taking the lawn mower to em .. solid..... after i toss
on some new grass seed to cover.. takes awhile but it does sink in..
i got a few going in a little 3 gallon pot.. will need to water them all the time to keep going and not get dehydrated quick and wilt and stress.. what temps your canopy run at ? im at 29 30 c which is right about max rate of growth peek in some studies ive read.. lots of water.. some like 25 to 29 .... 85f falls off after unless u co2
can say i know anything about auto grows.. i rather pull the switch myself when i think im ready for bloom... ?
cheers
heres a ten gallon pot .. get 4 of those in the tent .. its a lot of pro mix ..